Cap for paste tubes



May 1?, 1932.

A. F. SETHER CAP FOR PASTE TUBES Filed March 12, 1930 IN VENT OR 5 BY fl. F 7-HER ATTORNEY Patented May 17, 1932 7 UNITED" STATES ALVIN F. SETHER, OF EUGENE; OREGON 1;

7 CAP FOB PASTE :TUIBES Application filed March 12, 1,930; s as in. 435,241.

closure which need not be completely removed from the top in order to eject the material In therefrom. v

The third object is to so construct the cap as to provide the minimum amount of resistance to the flow of paste when opened and to completely seal sameagainst evaporation and 13 contamination when not in use.

The fourth object 1s to produce a cap which will be easy to construct by casting methods in order that its cost may bekept as low as possible.

The fifth object is to so construct the cap that while it may not be removed for the ejection of paste it can be removed for cleansing or sterilizing purposes should same be desired.

The sixth object is to so construct the cap that the closing operation is performed without requiring two metal faces to be forced into contact with each other.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawings, in which 2 v Figure 1 is a fragmentary side elevation of the outlet end of a paste tube with a portion of its cap broken away in section.

' Figure 2 is a section taken along the line 2-2 in Figure 1.

Figure 3 is an enlarged section along the line 33 in Figure 1.

Figure 4 is an enlarged section along the line 44 in Figure 1.

Figure 5 is an enlarged fragmentary elevation of the discharge tip.

Figure 6 is a side elevation of Figure 5.

Figure 7 is an enlarged side elevation of the cap in position on a tube.

Figure 8 is aplan of the cap.

Similar numbers of reference refer to similar parts throughout the several views.

Referring in detail to the drawings, there is shown the ordinary form of flexible tube 10 'forholding'paste 11. The discharge end 12 of thetube' 10 is considerably heavier than thesides of the tube 10 and preferably converges toward a point, after the fashion illustrated in the drawings. The end 12 terminates in an outlet tip 13 having a central opening 14 and an external thread 15.

Extending beyond the ends of the tip 13' are the converging arms 16 which terminate in a ball shaped tip 17 and are integral therewith. The outer face 18 of each arm 16 is curved to correspond with the root of the threads 15. The inner face 19 of each arm 16 is also preferably curved, as shown in Fig. 4. Between the arms 16 is an opening 20which communicates with the opening 14 within the tip 13. The converging faces 19 intersect along the lines 21 which form a divider for the out-going paste 11.

Turning'now to the cap itself it will be seen to consist, of a hexagonal portion 22, one end 23 of which is rounded and the other end 24 is square.

The cap25 thus described is provided with a recess 26 at one end and is threaded along its major "axis about one half the length of thecap,"the remaining portion having a cylindrical cavity 27 equaling the inside diameter of the cap thread 28. The recess 27 is somewhat larger than the diameter of the tip 17 but at its extreme end converges to form the outlet opening 29,'which is equal in diameter to the tip 17.

It is desirable to provide a gasket 30 around the outlet tip 13 against which the face 24 seats when the cap is screwed tight.

. The operation of the device is as follows: When it-is desired to eject paste 11 from the tubelO it is only necessary to rotate the cap 25 to the positionshown in Fig. 2, giving the material a free outlet. When no more paste is required the cap is screwed down to a seat against the gasket 30, causing the parts to take the position shown in Fig. 1 thereby completely cutting off any unused portion 31 of the paste, making it possible to I cleanse'th-e tube and cap in any way desired without wasting or;contaminating the contents thereof.

g IlS is a well known fact that many attempts have been made to provide devices of this character, which devices have failed to find their way into the market for the reason that they were too difiicult to manufacture, or because of the fact that they would soon become inoperative, the common method employed being to provide relatively small outlet o-penings in the tube or its outlet tip and then causing some other member to form a fiat seat thereon. Obviously, the efi'iciency of such devices sufi'ers when a relatively stifi p. ste is handled or when the paste becomes SUV, due to evaporation. I r

it will be noted in my device that the area of t e outlet passages beyond the opening 14 exceeds in area the size of that opening, and that \fiien thecap is screwed down there is no tendency to compress the paste between a pair of seating faces but only todischarge the small surplus within the recess 27 to allow the cap to seat upon the gasket 30.

I claim:

1.=In a paste container .the combination of a flexible tube having a threaded outlet -with a pair of arms projecting from the end of said outlet and converging toward each other in a manner to permit an opening to exist between said arms communicating with said outlet tip, said arms terminating in :a tip ofcircular cross section, a cap on said outlet having a recess formed therein larger than said tip, the outer end of saidcap.col iverging to form an opening adapted, to be closed 2b;- said tip, and ,a gasket between said cap and the junction of said tube andthreaded outlet.

2. A tip for tubular paste containers consisting of a threaded end having an opening formed therethrough, converging arms fess tending from opposite sides of said threaded 40. end and terminating in an enlarged ball the space between said arms constituting outlets cominunlcating with the opening in the threaded end, acap adapted to: be threadedon said tip havingan opening extending through the major portion thereof larger than said ball, the extreme outer end of said opening having areduced diameter for which-saidball forms a'closu-re. c

3. The combination of .athreaded'tip having an outletopeningtherein and having a said tip having an opening in the :end there-,

ofapproximating the diameter of .said ball. '4. In a paste tube the combination of a threaded tip having an outlet openi -ng'therein having a flat tapering extensionformed thereon, said tapering extension having an opening formed through its 1 ide tom'- rnunicating with the opening in aid tip, said tapering' extension "having a large b all formed of t'he'tip' and 'container, said tip having a pair of converging arms extending from its open end intersecting along the axis thereof, said arms having a double convex cross section, and having a ball point formed at said intersection together with a threaded cap :for

saidtube having an opening along its entire,

length one end of which is threaded .and the other end of which is reducedjn diameter to that of said-ball point.

6. In a tubular paste container, combi-i nation of a flexible tube having a threaded outlet tip pro ecting from oneend thereof, a. gasket surrounding the 'baseof said tip, a

pair of converging arms forming an extension for said tip, the space between saidarms con stituting diverging connections with the tip opening, and having a spherical point at the end of-convergence of said arms, and a thread-. ed cap for said tip adapted to seat against said gasket, said caphaving a tapering opening in its outer end whose minimum diameter, equals the maximumdiameter ofsaid spheri, cal point.

ALVIN r. snrrina] 

